NetBSD/etc/rc.subr

#	$NetBSD: rc.subr,v 1.7 1999/04/01 03:58:44 cjs Exp $
# functions used by various rc scripts

#
# checkyesno
#	Test $1 variable, and warn if not set to YES or NO.
#	return 0 if it's "yes" (et al), nonzero otherwise
#
checkyesno() {
	eval value=\$${1}
	case $value in

		#	"yes", "true", "on", or "1"
	[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
		return 0
		;;

		#	"no", "false", "off", or "0"
	[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
		return 1
		;;

	*)
		logger -s "WARNING: \$${1} is not set properly."
		return 1
		;;
	esac
}

#
# mount_critical_filesystems
#	Go through the list of critical filesystems, checking each one
#	to see if it is mounted, and if it is not, mounting it.
#
fstab=/etc/fstab
mount_critical_filesystems() {
	for fs in /usr /var $critical_filesystems; do
		if [ $1 = local ] && ! islocalfs $fs; then
			continue
		fi
		mount | (
			ismounted=no
			while read what _on on _type type; do
				if [ $on = $fs ]; then
					ismounted=yes
				fi
			done
			if [ $ismounted = no ]; then 
				mount $fs >/dev/null 2>&1
			fi
		)  
	done
}

islocalfs() {
	if [ -z "$1" ]; then
		echo 'islocalfs() called with no fs argument: aborting.'
		exit 3
	fi
	while read dev dir type opts; do
		if [ "$1" = "$dir" ]; then
			case $type in
				# Local filesystems.
				ados|cd9660|ext2fs|fdesc|ffs) return 0;;
				filecore|kernfs|lfs|mfs|msdos|null) return 0;;
				portal|procfs|ufs|umap|union) return 0;;
				# Network filesystems
				nfs) return 1;;
				# If we don't know, err on the safe side
				# and assume it's a network FS.
				*) return 1;;
			esac
		fi
	done < $fstab
	# We didn't find the FS. Return local to show error as
	# early in boot sequence as possible.
	echo "WARNING: islocalfs() in rc.subr doesn't recognise fstype $fs"
	return 1;
}